The Boston Scientific ENDOTAK RELIANCE 4-SITE DF4 Defibrillation Lead (REF 266) is a transvenous, dual-coil defibrillation lead designed for use with compatible implantable cardioverter defibrillator (ICD) and CRT-D pulse generators. The 4-SITE configuration uses a passive tined fixation design intended for placement in the right ventricular apex, while the DF4 connector consolidates pace/sense and high-voltage connections into a single in-line terminal to simplify header connection and reduce the device pocket footprint.
Key Features
Integrated DF4-LLHH connector for single-port connection to compatible DF4 pulse generators
Dual defibrillation coils (right ventricular and superior vena cava) for high-voltage therapy delivery
Passive fixation with silicone tines for stable right ventricular apical placement
ENDOTAK RELIANCE design platform with established transvenous lead heritage
True bipolar pace/sense configuration
Silicone insulation with polyurethane segments where applicable per manufacturer specification
Compatible with Boston Scientific DF4-headered ICD and CRT-D generators
Clinical Applications
Intended for chronic transvenous implantation as part of an implantable cardioverter defibrillator system
High-voltage defibrillation and cardioversion therapy delivery
Antitachycardia pacing (ATP) and bradycardia pacing support
Intracardiac electrogram sensing for tachyarrhythmia detection
Use in patients indicated for ICD or CRT-D therapy per physician determination
Product Information
Brand: Boston Scientific
Product Line: ENDOTAK RELIANCE 4-SITE
REF/UPN: 266
Category: ICD Leads for Implantable Cardioverter Defibrillators
Connector: DF4-LLHH
Fixation: Passive (tined)
Coil Configuration: Dual coil (RV and SVC)
Polarity: True bipolar pace/sense
Lead Length: Not specified in the located sources
Packaging: Single-use, sterile (refer to product label)
Storage: Per manufacturer Instructions for Use
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